Upload media Wikipedia: Instance of: disaster, volcano: Location: Unknown, Indonesia: Point in time: 75th millennium BC: Elevation above sea level: 2,157 m; 2° 34′ 12″ N, 98° 52′ 48″ E: Authority control Q1123218. The Toba catastrophe theory holds that this event caused a global volcanic winter of 6–10 years and possibly a 1,000-year-long cooling episode. The Toba catastrophe theory holds that 70,000 to 75,000 years ago, a supervolcanic event at Lake Toba, on Sumatra (Indonesia), possibly the largest explosive volcanic eruption within the last twenty-five million years, plunged the Earth, which was already in an ice-age, into an even colder spell. From Wikimedia Commons, the free media repository. The English word theory was derived from a technical term in philosophy in Ancient Greek.The word theoria, θεωρία, meant "a looking at, viewing, beholding", and referring to contemplation or speculation, as opposed to action. It is not intended to provide medical or other professional advice.Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners.Financial support for ScienceDaily comes from advertisements and referral programs, where indicated. From geologic evidence, it seems clear that the event happened at the suggested timeframe and that it was devastating, unleashing around 500 times the destructive power of all combined explosives used in WWII, including Nagasaki and Hiroshima. Some commonly known examples include In scientific usage, the term "theory" is reserved for explanations of phenomena which meet basic requirements about the kinds of empirical observations made, the methods of classification used, and the A major concern in construction of scientific theories is the Theories are intended to be an accurate, predictive description of the natural world.Scientific theories are constructed to explain and predict phenomena (e.g., inanimate things, events, or behavior of animals). a message expressing an opinion based on incomplete evidencea tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena"a scientific hypothesis that survives experimental testing becomes a scientific theory" "they killed him on the theory that dead men tell no tales" a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena"theories can incorporate facts and laws and tested hyp..." A doctrine, or scheme of things, which terminates in speculation or contemplation, without a view to practice; hypothesis; speculation.☞ “This word is employed by English writers in a very loose and improper sense. It had an estimated volcanic explosivity index of 8 (the highest rating of any known eruption on Earth); it made a sizable contribution to the 100×30 k… The Toba catastrophe theory holds that 70,000 to 75,000 years ago, a supervolcanic event at Lake Toba, on Sumatra (Indonesia), possibly the largest explosive volcanic eruption within the last twenty-five million years plunged the Earth, which was already in an ice-age, into an even colder spell. All rights reserved. It may not have been reviewed by professional editors (see Add new content to your site from Sensagent by XML.Get XML access to fix the meaning of your metadata. A classical example of the distinction between theoretical and practical uses the discipline of medicine: Medical theory and theorizing involves trying to understand the A common distinction made in science is between theories and Although it has more mundane meanings in Greek, the word In Aristotle's terminology, as has already been mentioned above, theory is contrasted with If there is a new theory which is better at explaining and predicting phenomena than an older theory (i.e. Some commonly known examples include In scientific usage, the term "theory" is reserved for explanations of phenomena which meet basic requirements about the kinds of empirical observations made, the methods of classification used, and the A major concern in construction of scientific theories is the Theories are intended to be an accurate, predictive description of the natural world.Scientific theories are constructed to explain and predict phenomena (e.g., inanimate things, events, or behavior of animals). A scientific theory can be thought of as a In pedagogical contexts or in official pronouncements by official organizations of scientists a definition such as the following may be promulgated.Some scientific explanations are so well established that no new evidence is likely to alter them.